<template>
  <div>
    <h1>当前求和为:{{sum}}</h1>
    <h3>当前求和放大10倍为:{{bigSum}}</h3>
    <h3>我在{{school}},学习{{subject}}</h3>
    <select v-model.number="n">
      <option :value="1">1</option>
      <option :value="2">2</option>
      <option :value="3">3</option>
    </select>
    <button @click="increment(n)">+</button>
    <button @click="decrement(n)">-</button>
    <button @click="incrementOdd(n)">当前求和为奇数再加</button>
    <button @click="incrementWait(n)">等一等再加</button>
  </div>
</template>
<script>
import { mapState, mapGetters, mapMutations, mapActions } from 'vuex';
export default {
  name: 'Count',
  data() {
    return {
      n: 1 //用户选的数字
    };
  },
  mounted() {
    console.log('Count', this);
  },
  computed: {
    //借助mapState生成计算属性,从state中读取数据.(对象写法)
    //...mapState({ he: 'sum', xuexiao: 'school', xueke: 'subject' })

    //借助mapState生成计算属性,从state中读取数据.(数组写法)
    ...mapState(['sum', 'school', 'subject']),

    /*************************************** */

    //借助mapGetters生成计算属性,从getters中读取数据.(对象写法)
    //...mapGetters({ bigSum: 'bigSum' }),

    //借助mapGetters生成计算属性,从getters中读取数据.(数组写法)
    ...mapGetters(['bigSum'])
  },
  methods: {
    //程序员亲自写方法
    /*increment() {
      this.$store.commit('JIA', this.n);
    },
    decrement() {
      this.$store.commit('JIAN', this.n);
    },*/

    //借助mapMutations生成对应的方法,方法中会调用commit去联系mutations(对象写法)
    ...mapMutations({ increment: 'JIA', decrement: 'JIAN' }),

    //借助mapMutations生成对应的方法,方法中会调用commit去联系mutations(数组写法)
    // ...mapMutations(['JIA', 'JIAN']),

    //程序员亲自写方法
    /*incrementOdd() {
      this.$store.dispatch('jiaOdd', this.n);
    },
    incrementWait() {
      this.$store.dispatch('jiaWait', this.n);
    }*/

    //借助mapActions生成对应的方法,方法中会调用dispatch去联系actions(对象写法)
    ...mapActions({ incrementOdd: 'jiaOdd', incrementWait: 'jiaWait' })

    //借助mapActions生成对应的方法,方法中会调用dispatch去联系actions(数组写法)
    //...mapActions(['jiaOdd', 'jiaWait'])
  }
};
</script>
<style lang="less" rel="stylesheet/less" scoped>
</style>